Imagine this;- Two planets and a star separated by cosmological distances that share an amost linear positional relationship - the star is not in the middle and both planets have a direct eyeline to it. Both planets have intelligent life and both are observing the star's redshift. Two photons leave the star's surface from almost the same place and at almost the same time (relative to each other). Each of the planets receives one of the photons and notes the redshift. Hubble's Law requires that the planet further away should note a greater redshift. How is it that the photons contain different information for different observers?